405nm is not UV and not even close the ionizing UV band. It's UVB that causes melanomas. UVC is even worse but you don't find that naturally on earth because it's filtered by the atmosphere.

LASERBEE: True it is possible to damage DNA from excessive heating (called denaturing) but that is independent of the wavelength. Any wavelength capable of being absorbed in high enough densities can damage surrounding tissue but any other heat source will do the same thing. Generally, once DNA is denatured it's damaged beyond repair and cannot be transcribed so the potential for any cancers is very low. Oxygen radicals are often the culprit from UVB exposure in the rise of melanomas.

Hey MrGreenJeans...

You need to look at the [ ] Smiley I used... It was meant as a joke...
I have no clue as to the truth of what I posted...

Commonly referred to as the HAZ (heat affected zone) in the cutting/etching industry, it refers to exactly that. When cutting or etching, the goal is to minimize the HAZ so as to limit the burning around the edges of the cut. This is obtained by cutting quickly with high power so the heat does not have a chance to travel too far through the target.

In your case, it burns fast enough that the heat does not go far enough to hit too many nerve endings, thus minimizing the pain. The few it does hit, it vaporizes and they have no chance to respond with a pain impulse. I've heard that getting a direct hit with a CO2 beam is relatively painless for this reason as well.

Dude its funny, but not smart. Not to mention the possible skin damage you could do, its not cool to post yourself irresponsibility using a laser. Not good for younger members or the forum in general. Please conciser deleting this.

__________________
If you ever see an Australian politician don't make any sudden movements; they tend to be startled easily and overreact.~3mW 632.8nm HeNe (Thanks Dave)50mW O-Like in Rayfoss host (Thanks Bobhaha)751 peak, 715 average 445nm, host in progress<100mW BR in 3405 host (Thanks Mohrenberg and Jayrob)

I don't think these pictures are doing too much harm, and if younger users decide to copy, then let them do it, if something goes wrong then they'l learn themselves not to copy the man from the internet, lawl.
I very republican belief I have there.
I'm really not posting them to show what I've done to my arm, but the power of this laser. I was just really surprised I was able to do this without sharpie.

I'm happy to say tho, that with no evidence to back it up, I'm pretty sure there was no harm done to my arm.

That is about the most irresponsible/juvenile thing I've heard in
a while...

You hand over a potentially harmful idea to the members on this
Forum and take no responsibility for your actions or for any
negative consequences that may arise from this idea being used
by others...

I don't think these pictures are doing too much harm, and if younger users decide to copy, then let them do it, if something goes wrong then they'l learn themselves not to copy the man from the internet, lawl.
I very republican belief I have there.
I'm really not posting them to show what I've done to my arm, but the power of this laser. I was just really surprised I was able to do this without sharpie.

I'm happy to say tho, that with no evidence to back it up, I'm pretty sure there was no harm done to my arm.

That is about the most irresponsible/juvenile thing I've heard in
a while...

You hand over a potentially harmful idea to the members on this
Forum and take no responsibility for your actions or for any
negative consequences that may arise from this idea being used
by others...